Players can receive a bleeding effect from being attacked by zombies or from coming in contact with Barbed Wire. Players will have their vision become red and will fluxulate between bright and dim contrasts.

Players who are bleeding will lose small amounts of Health up to 20 over a period of time. The only way to stop bleeding is to use the consumable Bandages, which also restores 10 Health.

It is actually possible to be brought down to 0 health and not die. This is a rare phenomanon, but is likely due to your health value being slightly above zero but still not high enough to be counted as 1%. You will be killed in one hit however.